package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.vo.OrderReportVO;
import com.sky.vo.SalesTop10ReportVO;
import com.sky.vo.TurnoverReportVO;
import com.sky.vo.UserReportVO;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;


    @Override
    public TurnoverReportVO getTurnover(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //获取营业额列表，和列表之间以逗号分隔
        List<Double> turnoverList = new ArrayList();
        for (LocalDate date : dateList) {
            //然后转换时间格式保持统一
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            //查出对应当天的营业额数据
            Map map = new HashMap<>();
            map.put("status", Orders.COMPLETED);
            map.put("begin", beginTime);
            map.put("end", endTime);

            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;

            //添加到集合中
            turnoverList.add(turnover);
        }

        //转为ov进行传输
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }


    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //获取一天数据
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //创建一个新增用户列表
        List<Integer> newUserList = new ArrayList<>();
        //创建一个总人数的集合
        List<Integer> totalUserList = new ArrayList<>();
        //拿到每一天
        for (LocalDate date : dateList) {
            //转换时间格式
            LocalDateTime bginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            //新增用户
            Integer newUser = getUserCount(bginTime, endTime);
            //总用户
            Integer totalUser = getUserCount(null, endTime);

            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }


        //2.总量用户列表,以逗号分割
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
    }


    public Integer getUserCount(LocalDateTime beginTime, LocalDateTime endTime) {
        Map map = new HashMap<>();
        map.put("begin", beginTime);
        map.put("end", endTime);

        return userMapper.countByMap(map);
    }


    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //获取每一天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //每天订单数
        List<Integer> orderCountList = new ArrayList<>();
        //每天有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();

        //循环操作里面日期数据
        for (LocalDate date : dateList) {

            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            //查询有效订单数
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            //查总订单数
            Integer orderCountCount = getOrderCount(beginTime, endTime, null);

            orderCountList.add(orderCountCount);
            validOrderCountList.add(validOrderCount);
        }


        //时间类有效数据,求和算出订单完成率
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();

        //订单完成率
        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }


    public Integer getOrderCount(LocalDateTime beginTime, LocalDateTime endTime, Integer status) {
        Map map = new HashMap<>();
        map.put("begin", beginTime);
        map.put("end", endTime);
        map.put("status", status);

        return orderMapper.countByMap(map);
    }


    @Override
/**
 * 查询指定时间区间内的销量排名top10
 * @param begin
 * @param end
 * @return
 * */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end){
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime, endTime);

        String nameList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()),",");
        String numberList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()),",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

}
